The Boyz's Chanhee said this in his recent Vlive:
He played and sang Day6's Zombie in his Vlive.
Fans often recommend them singing Day6 songs when they ask which songs should they sing (i'm one of those fans haha).
So Chanhee said: I think our fans like to listen to Day6's sunbaenim's song too. Maybe it's because we have similar music taste?
A fan commented: If you are kpop fan you have no choice but to like Day6.
And Chanhee answered: That's right!